qat_analyse_lim_rule_sigma_1d: Perform a sigma lim-rule-check

In qat: Quality Assurance Toolkit

Description

This check tests data on whether it exceeds a threshold formed by multiple standard derviations away from the mean.

Usage

qat_analyse_lim_rule_sigma_1d(measurement_vector, sigma_factor)

Arguments

measurement_vector	The measurement vector, which should be tested
sigma_factor	Multiplier of standard derivation, which determin the maximum allowed deviation from the mean

Details

First the mean and the standard derivation of the measurement vector will be calculated. After this the limits will be determined by

lim_{\pm} = μ \pm f σ,

where f is the given sigma factor.

Value

It returns a list with the following entries:

flagvector	A vector of length of measurement vector. For every element of the measurement vector the flagvector contains a -1, if its exceeding its dedicated minimum vector element, a 1, if its exceeding its dedicated maximum vector element, or a 0, when no exceeding has happend.
sigma_factor	Give back the given sigma\_factor
meanofvector	Give back the calculated mean of the measurement vector
sdofvector	Give back the calculated standard deviation of the measurement vector

Author(s)

Andre Duesterhus

References

Meek, D.W., Hatfield, J.L. (1994) Data quality checking for single station meteorological databases, \_Agricultural and Forest Meteorology\_, *69* (1-2), 85-109.

See Also

qat_plot_lim_rule_sigma_1d, qat_call_lim_rule, qat_analyse_lim_rule_static_1d, qat_analyse_lim_rule_dynamic_1d

Examples

vec <- rnorm(1000)
result <- qat_analyse_lim_rule_sigma_1d(vec, 2)

qat documentation built on May 2, 2019, 4:06 p.m.